Acourtia mexicana (Lag. ex D.Don) H.Rob. (original description)
Ageratina henzium B.L.Turner (original description)
Ageratum tehuacanum R.M.King & H.Rob. (original description)
Alepidocline breedlovei (B.L.Turner) B.L.Turner (original description)
Alepidocline macdonaldana B.L.Turner (original description)
Alepidocline trifida (J.J.Fay) B.L.Turner (original description)
Baccharis glandulifera G.L.Nesom accepted as Baccharis heterophylla var. glandulifera G.L.Nesom (original description)
Bidens colimana Melchert (original description)
Bidens oaxacana Melchert (original description)
Bidens pueblensis (Sherff) Melchert (original description)
Bidens saltillensis Melchert (original description)
Bidens schaffneri var. wrightii (A.Gray) Melchert accepted as Bidens aurea (Aiton) Sherff (original description)
Bidens sharpii (Sherff) Melchert (original description)
Bidens squarrosa var. atrostriata Roseman (original description)
Cosmos deficiens (Sherff) Melchert (original description)
Cosmos landii var. achalconensis Melchert (original description)
Cosmos pacificus var. chiapensis Melchert (original description)
Cosmos sessilis var. stellatus (Sherff) Melchert (original description)
Critoniopsis calerana (Cuatrec.) H.Rob. (original description)
Critoniopsis sodiroi (Hieron. ex Hieron.) H.Rob. (original description)
Crossothamnus pascoanus M.O.Dillon & B.L.Turner (original description)
Cyanthillium cordifolium (Benth. ex Oliv.) H.Rob. accepted as Gutenbergia cordifolia var. cordifolia (original description)
Digitacalia crypta B.L.Turner (original description)
Digitacalia hintoniorum B.L.Turner (original description)
Digitacalia jatrophoides var. pentaloba B.L.Turner (original description)
Erigeron quiexobrensis G.L.Nesom (original description)
Erigeron saxatilis G.L.Nesom (original description)
Erigeron sceptrifer G.L.Nesom (original description)
Erigeron vicinus G.L.Nesom (original description)
Erigeron zacatensis G.L.Nesom (original description)
Eupatorium heathiae B.L.Turner accepted as Adenocritonia heathiae (B.L.Turner) R.M.King & H.Rob. (original description)
Eupatorium siltepecanum B.L.Turner accepted as Critonia siltepecana (B.L.Turner) R.M.King & H.Rob. (original description)
Hieracium fendleri var. osterophyllum (Standl. & Steyerm.) B.L.Turner (original description)
Lasianthaea fruticosa var. villosa (Pol.) B.L.Turner (original description)
Senecio guerrerensis T.M.Barkley (original description)
Senecio macdonaldii B.L.Turner accepted as Psacaliopsis macdonaldii (B.L.Turner) C.Jeffrey (original description)
Senecio venturae T.M.Barkley (original description)
Thelesperma megapotamicum var. ramosius (S.F.Blake) Melchert (new combination reference)